Redwood City: 802 Brewster Ave, 3rd Floor Redwood City: San Mateo County Offices, County Center and Vicinity Redwood Shores: 100 Marine Parkway, Suite 125 Redwood Shores: 399 Marine Parkway San Carlos: 550 Quarry Road San Carlos: 610 Elm Street San Carlos: San Carlos Airport San Mateo Event Center San Mateo: 125 Lessingia Court (formerly 25 Tower Road) San Mateo: 150 W. 20th Ave Pagination Previous page Page 1 Page 2 Current page 3 Page 4 Page 5 Next page HR's Main Office: 455 County Center, 5th Floor San Mateo County Government Center Redwood City CA 94063 HR Testing/Interview/Training Locations: Please see your notification letter/email for room assignment